Table 2. Univariable analysis of the factors associated with postoperative hematoma occurrence (n=293).
| Variable | n | Hematoma | P value | |
|---|---|---|---|---|
| Occurrence (n=39) | No occurrence (n=254) | |||
| Age, years | 0.463 | |||
| Median | 27.8 | 27.6 | ||
| Range | 18.1-60.7 | 18.3-59.4 | ||
| Nodule size (mm) | <0.001 | |||
| Median | 23.5 | 17.8 | ||
| Range | 15.2-35.1 | 9.0-27.6 | ||
| Breast, n (%) | 0.562 | |||
| Right | 108 | 16 (41.0) | 92 (36.2) | |
| Left | 185 | 23 (59.0) | 162 (63.8) | |
| Nodule location, n (%) | 0.69 | |||
| UOQ | 155 | 22 (56.4) | 13 3(52.4) | |
| UIQ | 61 | 6 (15.4) | 55 (21.7) | |
| LOQ | 47 | 5 (12.8) | 42 (16.5) | |
| LIQ | 19 | 4 (10.3) | 15 (5.9) | |
| Subareolar | 11 | 2 (5.1) | 9 (3.5) | |
| BI-RADS classification of ultrasound, n (%) | 0.154 | |||
| Category 3 | 222 | 26 (66.7) | 196 (77.2) | |
| Category 4 | 71 | 13 (33.3) | 58 (22.8) | |
| Pathology, n (%) | 0.453 | |||
| Fibroadenoma | 126 | 16 (41.0) | 110 (43.3) | |
| Fibro adenosis | 103 | 10 (25.6) | 93 (36.6) | |
| Intraductal papilloma | 25 | 4 (10.3) | 21 (8.3) | |
| Inflammatory change | 17 | 4 (10.3) | 13 (5.1) | |
| Retention cyst of the breast | 12 | 3 (7.7) | 9 (3.5) | |
| Benign phyllodes tumor | 10 | 2 (5.1) | 8 (3.1) | |
| Number of nodules, n (%) | 0.004 | |||
| ≥2 | 40 | 11 (28.2) | 29 (11.4) | |
| Single | 253 | 28 (71.8) | 225 (88.6) | |
| Menstrual period, n (%) | 0.002 | |||
| Yes | 12 | 6 (15.4) | 6 (2.4) | |
| No | 281 | 33 (84.6) | 248 (97.6) | |
| Breast shape, n (%) | 0.009 | |||
| Larger and loose | 48 | 12 (30.8) | 36 (14.2) | |
| Small and compact | 245 | 27 (69.2) | 218 (85.8) | |
| Efficacy time of bandage (h), n (%) | 0.005 | |||
| 12–24 | 23 | 8 (20.5) | 15 (5.9) | |
| 48–72 | 270 | 31 (79.5) | 239 (94.1) | |
| Application of hemostatic agents, n (%) | 0.752 | |||
| Yes | 89 | 11 (28.2) | 78 (30.7) | |
| No | 204 | 28 (71.8) | 176 (69.3) | |
UOQ, upper outer quadrant; LOQ, lower outer quadrant; UIQ, upper inner quadrant; LIQ, lower inner quadrant; BI-RADS, breast imaging reporting and data system.